DA LEA. 51 



which are abruptly terminated at the apex and con- 

 tracted at the base, give it a peculiar barrel-like 

 appearance. The mouth is very small and of a 

 curious subtriangular shape. We have not seen a 

 living specimen of this shell, nor any description of 

 the animal. 



Hdb. The recorded localities are the rejectment of 

 a small stream at Merino, near Swansea, Cork, and 

 Miltown Malbay in Clare. We have also found it 

 amongst the rejectment of a small stream running into 

 the Tees, near Norton. 



BALEA. Prideux. 



Shell Sinistral, regular, elongated, tapering, oval; spire 

 resembling Clausilia, but has no clausium ; a single 

 tooth, on the pillar. 



Animal Resembling Bulimus. 



B. FRAGILIS. Draparnaud. PL VII, fig. 15. 



Turbo perversus, Linn. Pupa fragilis, Drap. Clau- 

 silia fragilis, Jeff. Balea perversa, Gray. 



This genus is intermediate between Pupa and Clau- 

 silia; from the former it differs in the unequal margin 

 of the mouth, and from the latter in having no clausium, 

 and the last whorl larger than the others. From 

 Bulimus it differs in having the aperture sinistral. It 

 is semi-transparent, and of a yellow olivaceous colour. 

 Whorls six or seven, slanting regularly to the apex, 

 which is rather acute. This shell closely resembles 

 the young of Clausilia nigricans, but may be distin- 

 guished from it by having the last whorl convex, not 

 flattened or keeled. Aperture pyriform. About the 

 third of an inch in length. Animal dark grey, rather 

 mottled. 



Hob. Found in all parts of the British Isles ; on the 

 trunks of trees, sometimes under moss, lichens, &c., 

 which are attached to walls. It is probably one of the 

 many shells which prefer limestone districts. 



E 2 



